GB691641A - Improvements in or relating to the production of poly-carboxylic acids - Google Patents

Improvements in or relating to the production of poly-carboxylic acids

Info

Publication number
GB691641A
GB691641A GB6845/51A GB684551A GB691641A GB 691641 A GB691641 A GB 691641A GB 6845/51 A GB6845/51 A GB 6845/51A GB 684551 A GB684551 A GB 684551A GB 691641 A GB691641 A GB 691641A
Authority
GB
United Kingdom
Prior art keywords
acid
polycarboxylic acids
oxidized
oxidation
suspension
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB6845/51A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Directie van de Staatsmijnen in Limburg
Original Assignee
Directie van de Staatsmijnen in Limburg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Directie van de Staatsmijnen in Limburg filed Critical Directie van de Staatsmijnen in Limburg
Publication of GB691641A publication Critical patent/GB691641A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F7/00—Compounds of aluminium
    • C01F7/68—Aluminium compounds containing sulfur
    • C01F7/72—Sulfites
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
    • C07C51/27—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with oxides of nitrogen or nitrogen-containing mineral acids

Abstract

Polycarboxylic acids (principally mellitic acid) are manufactured by the oxidation of natural or artificial materials rich in carbon, by passing nitric acid into a suspension of the carbonaceous material in sulphuric acid and heating the mixture to 130-230 DEG C. The nitric acid may be in liquid or vapour form, and in the latter case is advantageously mixed with a carrier gas, preferably an oxygen-containing gas such as air. The polycarboxylic acids may be isolated by filtering the hot reaction mixture to remove inorganic by-products, and crystallizing the acids by cooling the filtrate. In examples: (1) nitric acid (sp. gr. 1.4) is led into a suspension of coke breeze in 96 per cent sulphuric acid at 195-205 DEG C.; (2) the oxidation in (1) is effected at 170 DEG C.; (3) flotation fusain is oxidized as in (2); (4) coke from mineral oil products is oxidized as in (1) except that the concentration of the sulphuric acid is 90 per cent and the temperature 215 DEG C.; (5) pitch coke is oxidized as in (4).ALSO:Acid aluminium sulphate is obtained as a by-product in the manufacture of polycarboxylic acids by the oxidation of natural or artificial materials rich in carbon by passing nitric acid into a suspension of the carbonaceous material in sulphuric acid and heating the mixture to 130-230 DEG C. After separating the inorganic residue from the hot solution of the polycarboxylic acids by filtration, the acid aluminium sulphate, together with traces of other sulphates, may be extracted with water, and any residual silicic acid removed by filtration. In an example, coke breeze is employed as starting material.
GB6845/51A 1950-03-28 1951-03-22 Improvements in or relating to the production of poly-carboxylic acids Expired GB691641A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL296659X 1950-03-28

Publications (1)

Publication Number Publication Date
GB691641A true GB691641A (en) 1953-05-20

Family

ID=19783006

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6845/51A Expired GB691641A (en) 1950-03-28 1951-03-22 Improvements in or relating to the production of poly-carboxylic acids

Country Status (5)

Country Link
US (1) US2673216A (en)
CH (1) CH296659A (en)
DE (1) DE873542C (en)
GB (1) GB691641A (en)
NL (1) NL69391C (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2819300A (en) * 1950-09-09 1958-01-07 Grosskinsky Otto Process of producing and purifying benzene carboxylic acid
DE954239C (en) * 1953-03-06 1956-12-13 Bergwerksverband Zur Verwertun Process for the preparation of carbonic acid mixtures
NL97509C (en) * 1954-08-12
US2929838A (en) * 1957-09-19 1960-03-22 Dow Chemical Co Halogenated coal acids
US3325507A (en) * 1963-11-27 1967-06-13 Merck & Co Inc Process for the preparation of 5-nitroimidazole-2-carboxylic acids
US3624004A (en) * 1968-02-16 1971-11-30 Standard Oil Co Process for the production of active carbons

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR879182A (en) * 1943-02-23
GB190724662A (en) * 1907-11-07 1908-01-02 Read Holliday & Sons Ltd Improvements in the Manufacture of Mellitic Acid.
US1356137A (en) * 1914-12-30 1920-10-19 Chemical Foundation Inc Process of preparation of oxalic acid
DE441432C (en) * 1920-09-14 1927-03-04 I G Farbenindustrie Akt Ges Process for the preparation of organic acids
US2176348A (en) * 1937-04-05 1939-10-17 Carnegie Inst Of Technology Manufacture of mellitic acid
US2193337A (en) * 1938-02-23 1940-03-12 Ici Ltd Catalytic oxidation of carboniferous materials
DE747167C (en) * 1941-02-26 1945-01-13 Bernhard Juettner Dipl Ing Process for the production of nitrogenous fertilizers from fossil or recent plant bodies
DE749974C (en) * 1942-09-23 1944-12-12 Process for the preparation of benzene polycarboxylic acids
US2461740A (en) * 1947-10-02 1949-02-15 Carnegie Inst Of Technology Process of making organic acids from carbonaceous material
GB652935A (en) * 1948-06-29 1951-05-02 Carnegie Inst Improvements in or relating to process for making organic acids from carbonaceous material

Also Published As

Publication number Publication date
US2673216A (en) 1954-03-23
DE873542C (en) 1953-04-16
NL69391C (en)
CH296659A (en) 1954-02-28

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